Jongno 3(sam)-ga Station is an underground station on lines 1, 3 and 5 of the Seoul Subway in South Korea.

In December 2010 the station is recorded as having the fifth highest WiFi data consumption of all the Seoul Metropolitan Subway stations, following Express Bus Terminal Station, Sadang Station, Dongdaemun Station and Jamsil Station.

G

Street level

Exit

L1 Concourse

Lobby

Customer Service, Shops, Vending machines, ATMs

L2 Line 1 platforms	Side platform, doors will open on the left
	Southbound	→ Line 1 toward Incheon, Sinchang or Seodongtan (Jonggak) →
	Northbound	← Line 1 toward Soyosan, Uijeongbu or Kwangwoon University (Jongno 5(o)-ga)
	Side platform, doors will open on the left

L3 Line 3 platform	Northbound	← Line 3 toward Daehwa (Anguk)
	Island platform, doors will open on the left
	Southbound	→ Line 3 toward Ogeum (Euljiro 3(sam)-ga) →

L4 Line 5 platform	Westbound	← Line 5 toward Banghwa (Gwanghwamun)
	Island platform, doors will open on the left
	Eastbound	→ Line 5 toward Hanam Geomdansan or Macheon (Euljiro 4(sa)-ga) →

The station opened to Line 1 services on August 15, 1974. On October 18, 1985, services on Line 3 began stopping at Jongno 3(sam)-ga, and on December 30, 1996, Line 5 trains began calling here.

The following places are accessible from this station's exits as listed.

• Exit 1: Jongno 1, 2, 3, 4 Ga Dong Office, Jongno 2 Ga Post Office, Jongno 2 Ga Public Safety Centre, Tapgol Park; Insa Dong
• Exit 2; 2-1: Changdeokgung
• Exit 3: Donui Dong; Jongno 3 Ga Fire Station; Jongno 3 Ga Public Safety Centre; Jongmyo; Jongmyo Citizens' Park
• Exit 4: Nakwon Dong. Exit 6 is used from Line 1.
• Exit 5: Seoul Gyodong Primary School; Seoul Unhyeon Primary School; Jongnno 1, 2, 3, 4 Ga Dong Office; Jongno 2 Ha Post Office; Jongno 2 Ga Public Safety Centre; Jongno Tax Office; Tapgol Park. Exit 3 or 6 is used from Line 1.
• Exit 6: Jongno 3 Ga Fire Station
• Exit 7: Anguk Dong; Donhwamun; Jongno 3 Ga Public Safety Centre; Changdeokgung
• Exit 8: Myo Dong; Changdeokgung; Jongmyo Citizens' Park
• Exit 9: Jongmyo; Jongno 3 Ga Fire Station; Jongno 3 Ga Public Safety Centre
• Exit 10: Jongmyo; Jongmyo Citizens' Park
• Exit 11: Daerim Shopping
• Exit 12: Jongno 4 Ga
• Exit 13: Jangsa Dong; Cheonggyecheon 3 Ga
• Exit 14: Cheonggyecheon 3 Ga; Seoul Teenagers' Training Centre
• Exit 15: Gwansu Dong; Jongno 2 Ga; Industrial Bank of Korea, End of Jongno

In January 2013, the Seoul Metropolitan Rapid Transit Corporation, which operates this line, published free guidebooks in three languages: English, Japanese and Chinese (simplified and traditional), which features eight tours as well as recommendations for accommodations, restaurants and shopping centers. The tours are designed with different themes, e.g. Korean traditional culture, which goes from this station to Anguk Station and Gyeongbokgung Station on line No 3 that showcases antique shops and art galleries of Insa-dong.